Commits on May 2, 2020

1. sqlparser: column option and table option radondb#615 …

   [summary]
   reference: https://dev.mysql.com/doc/refman/5.7/en/create-table.html
   
   1. complete more columnn options, add `STORAGE DEFAULT` which is not descriped on official 5.7 document, but actually mysql support it.
   see: https://github.com/mysql/mysql-server/blob/5.7/sql/sql_yacc.yy#L6953
   and extra option suppored by mysql: `ON UPDATE ...`
   see: https://github.com/mysql/mysql-server/blob/5.7/sql/sql_yacc.yy#L6888
   ```
   column_definition:
       data_type [NOT NULL | NULL] [DEFAULT default_value]
         [AUTO_INCREMENT] [UNIQUE [KEY]] [[PRIMARY] KEY]
         [COMMENT 'string']
         [COLLATE collation_name]
         [COLUMN_FORMAT {FIXED | DYNAMIC | DEFAULT}]
         [STORAGE {DISK | MEMORY}]
         [ON UPDATE NOW_SYM]
     | data_type
         [COLLATE collation_name]
         [VIRTUAL | STORED] [NOT NULL | NULL]
         [UNIQUE [KEY]] [[PRIMARY] KEY]
         [COMMENT 'string']
   ```
   Currently we do not support  column option ` [reference_definition]`, ` [GENERATED ALWAYS] AS (expr)`
   also : some `DEFAULT now_or_signed_literal` and `SERIAL_SYM DEFAULT VALUE_SYM` options not in 5.7 document, but acctually mysql support them.
   see:
   https://github.com/mysql/mysql-server/blob/5.7/sql/sql_yacc.yy#L6897
   https://github.com/mysql/mysql-server/blob/5.7/sql/sql_yacc.yy#L6887
   
   2. complete more table options.
   ```
   table_option:
       AUTO_INCREMENT [=] value
     | AVG_ROW_LENGTH [=] value
     | [DEFAULT] CHARACTER SET [=] charset_name
     | CHECKSUM [=] {0 | 1}
     | [DEFAULT] COLLATE [=] collation_name
     | COMMENT [=] 'string'
     | COMPRESSION [=] {'ZLIB' | 'LZ4' | 'NONE'}
     | CONNECTION [=] 'connect_string'
     | {DATA | INDEX} DIRECTORY [=] 'absolute path to directory'
     | DELAY_KEY_WRITE [=] {0 | 1}
     | ENCRYPTION [=] {'Y' | 'N'}
     | ENGINE [=] engine_name
     | INSERT_METHOD [=] { NO | FIRST | LAST }
     | KEY_BLOCK_SIZE [=] value
     | MAX_ROWS [=] value
     | MIN_ROWS [=] value
     | PACK_KEYS [=] {0 | 1 | DEFAULT}
     | PASSWORD [=] 'string'
     | ROW_FORMAT [=] {DEFAULT | DYNAMIC | FIXED | COMPRESSED | REDUNDANT | COMPACT | TOKUDB...}
     | STATS_AUTO_RECALC [=] {DEFAULT | 0 | 1}
     | STATS_PERSISTENT [=] {DEFAULT | 0 | 1}
     | STATS_SAMPLE_PAGES [=] value
     | TABLESPACE tablespace_name [STORAGE {DISK | MEMORY}]
   ```
   Currently we do not support  table options:
   `UNION [=] (tbl_name[,tbl_name]...)`
   [test case]
   sqlparser/parse_test.go
   sqlparser/ddl_test.go
   proxy/ddl_test.go
   [patch codecov]
   N/A

   

   hustjieke committed May 2, 2020
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